docs: included .test constructor docs

packages/pinball_components/lib/src/components/alien_bumper/alien_bumper.dart

@@ -62,7 +62,11 @@ class AlienBumper extends BodyComponent with InitialPosition {
           children: children,
         );
 
-  /// {@macro alien_bumper}
+  /// Creates an [AlienBumper] without any children.
+  ///
+  /// This can be used for testing [AlienBumper]'s behaviors in isolation.
+  // TODO(alestiago): Refactor injecting bloc once the following is merged:
+  // https://github.com/flame-engine/flame/pull/1538
   @visibleForTesting
   AlienBumper.test({
     required this.bloc,

packages/pinball_components/lib/src/components/dash_nest_bumper/dash_nest_bumper.dart

@@ -78,7 +78,11 @@ class DashNestBumper extends BodyComponent with InitialPosition {
           bloc: DashNestBumperCubit(),
         );
 
-  /// {@macro dash_nest_bumper}
+  /// Creates an [DashNestBumper] without any children.
+  ///
+  /// This can be used for testing [DashNestBumper]'s behaviors in isolation.
+  // TODO(alestiago): Refactor injecting bloc once the following is merged:
+  // https://github.com/flame-engine/flame/pull/1538
   @visibleForTesting
   DashNestBumper.test({required this.bloc})
       : _majorRadius = 3,

packages/pinball_components/lib/src/components/sparky_bumper/sparky_bumper.dart

@@ -79,7 +79,11 @@ class SparkyBumper extends BodyComponent with InitialPosition {
           children: children,
         );
 
-  /// {@macro sparky_bumper}
+  /// Creates an [SparkyBumper] without any children.
+  ///
+  /// This can be used for testing [SparkyBumper]'s behaviors in isolation.
+  // TODO(alestiago): Refactor injecting bloc once the following is merged:
+  // https://github.com/flame-engine/flame/pull/1538
   @visibleForTesting
   SparkyBumper.test({
     required this.bloc,